scam

Recorded message immediately played when call was answered. Voice (Male with American accent) claimed to be from Australian Taxation Office and that lawsuits were being filed against my name and that to avoid arrest I needed to call the number back immediately.

Called this number, rang once then disconnected

DON'T SAY ANYTHING WHEN ANSWERING. The caller was a recorded voice telling me the tax office had a court case against me.

Sounds "official" though with an American accent! Doesn't say who they actually are. Threatening with the issue of an arrest warrant